Fixture for incandescent-lamp burners



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` J. W. MGKNIGHT. FIXTURE FOR INGANDESGBNT LAMP BURNERS. No. 558,911. Patented Apr. 21, 1896.

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J. W. MGKNIGHT. FIXTURE FOR INGANDESGBNT LAMP BURNERS.

No. 558,911. PatrentedApr. 21, 1896. Y

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.IOHN IYESLEY MCKNIGIIT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE IVELSBACII LIGHT COMPANY, OF GLOUCESTER CITY, NEV JERSEY.

FIXTURE FOR lNCANDESCENT-LAVIP BURNERS.

SPECIFICATION forming part of Letters Patent No. 558,911, dated April 21, 18961.

Application filed July 5, 1895. Serial No. 555,043. (No model.)

To all whom t may concern: Y

'Bo it known that I, JOHN WESLEY Mc- KNIGHT, a citizen ofthe United States, residing at the city of Philadelphia, in the county 5 of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Fixtures for WVelsbach and other Incandescent Gas-Burners, of which the following is a specification.

1o Incandescent gas-burners-such, for example, as the well-known iYelsbach burnersare efficient, satisfactory, and durable and have come into wide and general use. However, their use has been somewhat curtailed I 5 because the mantles or incandescente are not well adapted to sustain, resist, or withstand shocks, jars, or vibrations such as are imparted to them by the constant manipulation of the lgas-supply valve in lighting and extin- 2o guishing` them and such as occur in mills,

storehouses, railway-cars, and other analogous structures. Y

It is the principal object of my invention to protect such mantles or incandescents from 25 injury such as would arise from the necessary manipulations of the gas-supply valve and from shocks and jars otherwise imparted to the fixture. To this end my invention comprises the improvements hereinafter de- 30 scribed and claimed.

The nature, characteristic features, and scope of my invention will be more fully understood from the following descriptiomtaken in connection with the accompanying draw- 3 5 ings, forming part hereof, and in which- Figure l is a view of a two-part gas-fixture cmbod yin g features of my invention and having its fixed and movable parts connected by a spring-support and a flexible gasway and showing the gas-supply valve applied to the :fixed part, whereby its manipulation does not shock or jar the mantles. Fig. 2 is a View, partly in section, of a portion of the fixture shown in Fig. l. Fig. 3 is a view illustrating 45 a fixture embodyinga modification of my invention wherein the spring-support comprises an elastic body and the flexible gasway comprises fiexibly-jointed sections of pipe. Fig.

4c is a view, partly in section, illustrating a 5o portion of the fixture shown in Fig. 3; and Fig. 5 is a sectional view illustrating another modification of my invention wherein the spring-support is bored to form the fiexible gasway.

In the drawings, l are the mantles or incau- 5 5 descents of Velsbach or other type of incandescent gas-burners.

2 is the movable part of the fixture, that carries these mantles or incandescents and their burners, and it is provided With suitable gas 6o ways, as

a is the fixed part of the fixture, that is usually attached to the ceiling, roof, or other structure and is supplied with gas by means of a gasway, as 5, communicating with a suitable 6 5 supply-pipe. (Not shown.)

The fixed and movable parts 2 and 4E are connected by a spring-sup port and by a flexible gasway. In Figs. land 2 the spring-support comprises a spiral spring (5 anda flexible 7o gasway 7, in Figs. 3 and f an elastic tube S and flexibly-jointed lazy-tongs 9, and in Fig.

5 use is made of an elastic tube l0, having an opening 1l through it.

l2 is a gas-supply valve interposed in the 75 fixed part i of the fixture and adapted to afford means for turning on and off the supply of gas for the purpose of lighting and extinguishing the burners, as it is frequently necessary or desirable to do.

13 are emergency-keys, which may be employed for extinguishing any one or more of the burners in case of an accident to its or their mantles or in case it or they are not required for the purpose of furnishing the req- S 5 uisite amount of light.

The mode of operation of a fixture of my invention maybe described as follows: Then the gas-supply valve l2 is opened or closed, 'which is done every time the burners are 9o lighted or extinguished, a considerable shock. or jar is imparted. However, this shock or jar does not reach the mantles or incandescents l, but is confined to the fixed part 4: of the fixture. Moreover, the spring support 95 and fiexible gasvvay not only prevent damage to the mantles or incandescents by taking up shocks and jars arising from the necessary manipulations of the gassupply valve l2, but also take up such other shocks or jars as may roo be imparted to the fixed part of the fixture.

In consequence of the foregoing the life and Io descents or mantles and attached to its fixed part by a spring-support and a flexible gas- Way, with, a gas-supply valve interposed in said fixed part whereby shocks and jars incident to the manipulation of sald valve are conined to the iixed part, substantially as described.

In testimony whereof I have hereunto signed iny name.

JOI-IN IVESLEY MCKNIGII'I. In presence of- EVAN J. LESTER, K. M. GILLIGAN. 

